The structure of xenon oxytetrafluoride as determined by gas-phase electron diffraction is in essential agreement with the published microwave $results.^{1}$ The electron diffraction data permit a more precise determination of the Xe-F bond length than do the microwave data, but fairly large uncertainities must be associated with the Xe-O bond length and the O-Xe-F angle. The use of microwave data as an additional constraint on the interpretation of the electron diffraction data leads to a significantly more precise structure than can be derived from either set of data alone. It was observed that the new partial wave scattering factors of Cox and $Bonham^{2}$ are in better accord with the experiment than are the conventional Born scattering factors.